Semi automatic bolt kit for the MP-28

This kit is designed around our (MP28-SAT) and will accept an original extractor and cocking handle for an authentic look.

This kit comes with a build guide and includes the following parts: semi auto bolt, standard AR-15 firing pin, roll pin, firing pin spring, bolt stop, guide rods, and 2 sets of springs.

You may need additional USA made parts to be 922R compliant. This design is based on our ATF approved STEN MK3 model.